trephine :

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trephine


  • n  a surgical instrument used to remove sections of bone from the skull
  • v  operate on with a trephine

  • Of prehistoric brain surgery Anatomist Kappers reminisced, "It is even probable that the trephine holes found in prehistoric skulls 50,000 years old were made for curative .
  • The sharp point of this she pressed into her scalp over a trephine hole.
  • He excises the cornea with a circular saw called a trephine, whose diameter is a shade more than one-sixth of an inch.

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